header.gif
http://hdr.undp.org/fr/rapports/mondial/rmdh2009/
Excel database of raw data from the United Nations covering:
· Literacy Rates
· Access to clean water
· Pollution
· Population by country, Immigration and Gender statisitics
· Numbers living in Urban or Rural environments
· Education and Health expenditures
· Income and GDP
Etc.

http://www.commonwealthfund.org/Content/Publications/In-the-Literature/2007/Nov/Toward-Higher-Performance-Health-Systems--Adults-Health-Care-Experiences-in-Seven-Countries--2007.aspx
Healthcare provision expenditure and access for:
· United States, Germany, Canada, US, Australia, Netherlands, New Zealand

http://www.who.int/research/en/
World Health Organisation data and statistics.

http://hdr.undp.org/en/statistics/data/climatechange/
UN stats on climate change: CO2 emissions by country and population etc.

http://www.gapminder.org/downloads/
Outstanding visual representations of data for numerous indicators across many countries and dating back to 1960s and beyond. Most of the Excel data that underlies these graphs is downloadable/accessible from the site but takes a little digging around to find.

http://en.wikipedia.org/wiki/List_of_billionaires
Wikipedia list of billionaires

http://web.archive.org/web/20060717051912/www.cia.gov/cia/publications/
Data from the C.I.A. and its “World Factbook”.